Percentage & Ratio Problems — Engineering Board Exam Practice Questions

8 free engineering board exam reviewer questions on Percentage & Ratio Problems (Algebra), each with the correct answer and a worked solution.

1. Asyong spent 10% of his salary on transportation expenses, 20% of his salary on food. He then spent 30% of the rest of his salary on…
2. The ratio of men to women is 6:4. 60% of the men and 40% of the women take lunch in the canteen. What percent of the class take lunch in…
3. A shipment of items is divided into two portions such that the difference between the portions is one-half of their average. Find the…
4. If A:B=2:3 and B:C=4:5, find A:B:C.
5. A merchant marks goods 40% above cost and then gives a 10% discount. What is the percent profit based on cost?
6. The price of a commodity rises by 20% and then falls by 20%. What is the net percent change in price?
7. In a class of 40 students, the ratio of boys to girls is 3:5. How many girls are in the class?
8. A shirt marked P800 is sold at a 15% discount. What is the selling price?